<form name="add_expaccount_form" style="width:400px">
    <div class="form-group mt10 clearfix">
        <span class="col-sm-6 control-label form-cell">体验账号:</span>
        <div class="col-sm-18">
            <input type="text" class="input-text" name="username" required ng-model="username">
            <div ng-messages="add_expaccount_form.username.$error"
                 ng-show="add_expaccount_form.$submitted || add_expaccount_form.username.$touched">
                <p class="error" ng-message="required">体验账号不能为空。</p>
            </div>
        </div>
    </div>

    <div class="form-group mt10 clearfix">
        <span class="col-sm-6 control-label form-cell">登录密码:</span>

        <div class="col-sm-18">
            <input type="text" class="input-text" name="pwd" required ng-model="pwd">
            <div ng-messages="add_expaccount_form.pwd.$error"
                 ng-show="add_expaccount_form.$submitted || add_expaccount_form.pwd.$touched">
                <p class="error" ng-message="required">密码不能为空。</p>
            </div>
        </div>
    </div>
</form>